Why Builders Choose Core 4x4
The only aftermarket suspension brand with an X-Series product system
vs. MetalCloak
One price point, no tier options. Core 4x4 Crawl matches their performance at a better price with a better warranty.
vs. Teraflex
Skip a grease interval? Warranty voided. Core 4x4 Cruise requires zero maintenance — and our warranty covers everything.
vs. Clayton / Budget
Cheaper arms exist. But adjustable, American-made, 10 colors, lifetime guarantee, and an upgrade path? Only Core 4x4.
Unmatched Strength, Stability, and Adjustability
Power up your 2021-Present RAM TRX with the CORE 4X4 7075 Aluminum Rear Control Arm Set (R-TRX-2021-AL-RS4)—an elite suspension upgrade designed to take your already ferocious off-road machine to an entirely new level of performance. Built for high-speed desert racing, rocky trails, and everything in between, these control arms are the premium solution your TRX deserves. If you’re ready to dominate the toughest terrains and showcase unmatched handling, durability, and axle alignment, these arms will let you unleash the full potential of your truck.
What’s Included in the Set
- Adjustable Rear Upper Control Arms – R-TRX-2021-AL-RU2
- Adjustable Rear Lower Control Arms – R-TRX-2021-AL-RL2
Key Features and Benefits
- Heavy-Duty 7075 Aluminum Construction – Built from 2.5” OD 7075 aluminum, offering maximum strength, longevity, and weight savings over steel alternatives.
- Massive 3.0” Rock Jock Johnny Joints – Fully greaseable and rebuildable 1.5” threaded joints for unmatched durability, flexibility, and suspension articulation.
- On-Vehicle Adjustability for Precision Alignment – Left-hand and right-hand threaded adjusters allow for quick axle centering and pinion angle correction without removal.
- Engineered for Extreme Off-Road Desert Racing – Ensures improved tracking, reduced tire wear, and enhanced ride quality under the most intense performance demands.
Optional Hardware Upgrade
This control arm set installs using factory hardware for a direct bolt-on fit. For trucks with rusted or stubborn bolts, we offer Grade 8 hardware kits separately for a hassle-free installation.
Performance-Driven Engineering for Maximum Control
Our 7075 aluminum rear control arm set is meticulously designed to enhance suspension geometry, improve traction, and eliminate weak factory components. Key advantages include:
Smoother articulation and reduced stress on bushings and mounting points.
Fine-tuned suspension adjustability for perfect axle centering and pinion angles.
Unmatched durability for high-speed desert runs, technical rock crawling, and unstoppable off-road performance.
This set isn’t just an upgrade—it’s a complete transformation for your truck’s rear suspension, providing long-term reliability and top-tier performance worthy of the RAM TRX’s premium pedigree.
Two-Stage Powder Coating for Maximum Durability
To ensure long-term corrosion resistance, all aluminum components undergo a two-stage powder coating process:
Zinc primer base coat for superior rust protection.
Top coat available in 10 colors to match your truck’s aesthetics and ensure long-lasting durability.
Proudly Made in the USA
Manufactured in Orem, UT, our CORE 4X4 7075 Aluminum Rear Control Arm Set is built using high-quality, American-sourced materials under strict quality control standards. Supporting American manufacturing means investing in superior craftsmanship and unmatched reliability.
In Conclusion
The CORE 4X4 7075 Aluminum Rear Control Arm Set is the ultimate suspension upgrade for RAM TRX owners seeking superior adjustability, long-lasting durability, and high-performance handling. By replacing weak factory components with aircraft-grade 7075 aluminum, you ensure greater stability, improved ride quality, and unrivaled reliability for extreme off-road desert racing—and beyond. Upgrade today and experience the CORE 4X4 difference—because your RAM TRX deserves nothing less than the very best.
| Make | Model | Submodel | Years |
|---|---|---|---|
| Ram | TRX | 2021 - 2024 |
| Vehicle | Ram TRX (21–24) |
| Brand | CORE 4X4 |
| Color | Black or Blue or Charcoal or Green or LightGreen or Orange or Purple or Red or White or Yellow or Raw Aluminum or Custom Color - Other than what is listed above. Extra charge varies. We will reach out after order is placed. |
See It Installed
Install videos and build guides on our YouTube channel.
Watch more installs on YouTube
Reviews from Google
